NOOP Method

Perform a NOOP command.

[Syntax]
C++: HRESULT NOOP()
Visual Basic: NOOP
C#: void NOOP()

Remarks

Use this method to keep active connection with POP3 & IMAP4 server. It is used when your application need a long time to operate other transactions.

Usage Example

Sub DoNoop( pop3Server As String, pop3User As String, pop3Password As String )
  Dim oPop3 As ANPOPLib.POPMAIN
  Dim oMsg As ANPOPLib.POPMSG
  Dim i, nRet, nSize, nCount As Integer
  Dim emailContent, messageId, err As String
  
  Set oPop3 = new ANPOPLib.POPMAIN 'Create object instance
  Set oMsg  = new ANPOPLib.POPMSG
     
  'For IMAP4 server, please add the following code
  'oPop3.IMAP4Connection = 1
  'oPop3.ServerPort = 143
  
  err = ""
  nRet = oPop3.Connect( pop3Server, pop3User, pop3Password ) 'Connect pop3 server
  If nRet <> 0 Then
    err = "error with connecting server"
    goto ErrorHandler
  End If
  
  Call oPop3.DoNOOP()
ErrorHandler:
  Call oPop3.Close() 'Close connection
  Set oPop3 = Nothing
  Set oMsg = Nothing
  
End Sub

public void DoNoop( string pop3Server, string pop3User, string pop3Password )
{
  POPMAINClass oPop3 = new POPMAINClass();  //Create object instance
  POPMSGClass oMsg = new POPMSGClass();
  int i = 0, nRet = 0, nSize = 0, nCount = 0;
  string emailContent = "", messageId = "";
  
  try
  { 
    //For IMAP4 server, please add the following code
    //oPop3.IMAP4Connection = 1;
    //oPop3.ServerPort = 143;
    
    nRet = oPop3.Connect( pop3Server, 
                          pop3User, 
                          pop3Password ); //Connect pop3 server
    if( nRet != 0 )
      throw new Exception( "error with Connect" );
   
    oPop3.NOOP();
  }
  catch( Exception e )
  {
    Console.WriteLine( e.Message );
  }
  
  oPop3.Close(); //Close connection
  oPop3 = null;
  oMsg = null;
}

#include <comdef.h>
#include <string>
#include <iostream>
using namespace std;
#import "c:\program files\adminsystem.net\anpop\anpop.dll" no_namespace

VOID DoNoop( const char* lpszServer, 
             const char* lpszUser, 
             const char* lpszPassword )
{
  ::CoInitialize( NULL );
  
  IPOPMAINPtr	oPop3("ANPOP.POPMAIN");
  IPOPMSGPtr	oMsg("ANPOP.POPMSG");
  int i = 0, nCount = 0, nRet = 0, nSize = 0;
  _bstr_t emailContent = "", messageId = "";
  
  try
  {
    //For IMAP4 server, please add the following code
    //oPop3->IMAP4Connection = 1;
    //oPop3->ServerPort = 143;
      
    nRet = oPop3->Connect( _bstr_t(lpszServer), 
                              _bstr_t(lpszUser), 
                              _bstr_t(lpszPassword));
    if( nRet != 0 )
      throw string( "error with Connect" );
      
    oPop3->NOOP();
  }
  catch( string &e )
  {
    cout << e << endl;
  }		

  oPop3->Close();   //Close connection
  oPop3.Release();
  oMsg.Release();
  ::CoUninitialize();
}

See Also

GetMsgID Method
Retrieve Method

Asynchronous mode

OnError Event

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